Lathe-tool holder.



I. BOTTS.

LATHE TOOL HOLDER.

APPL IOATlON IILED NOV. 29, 1913.

Patented Mar. 31, 1914.

IRA BOTTS, OF LOS ANGELES, CALIFORNIA.

@NTTIE LATHE-TOOL HOLDER.

g g g. Specification of Letters Patent. P t ted Mar. 31, 1914. Application fi1ed November 29, 1913. Serial No. 803,738.

To all whom it may concern: head and divide the boss into laterally spaced Be it known that I, IRA Bo'r'rs, a citizen sections. This slot is constructed initially of theUnited States, residing at Los Angeles, equal in width throughout to the width of in the county of Los Angeles and State of the particular cutting tool to be mounted in 80 California, have invented new and useful the slot, the slot being very narrow in this Improvements in Lathe-Tool Holders, of instance owing to the narrowness of the partwhich the following is a specification. ing tool. The side portions of the head, This invention relates to a tool holder for which define the side walls of the slot, are, lathes or planers, the chief object being to however, sprung laterally prior to the tem- 5 provide a holder wherein the cutting tool pering of the holder, which latter is conmay be mounted in a very secure manner so structed preferably of a fine grade of steel. that it will withstand the severe conditions Owing to this feature of the construction, a of usage upon a high speed lathe and especutting tool, such as that indicated by the cially in cutting hard steel. numeral 5, may be mounted within the slot a A further object is to provide a device of 4, so as to be seated upon the base wall 6 of this character which is extremely simple in the slot, the active portion of which is disconstruction and composed of very few parts posed parallel to the under face 7 of the so aS to be rendered durable, easy to operate, holder, with its cutting end 8 projecting out and inexpensive in the cost of manufacture. wardly in prolongation of the holder. When 5 The invention consists in the features of the cutting tool is mounted between the construction, combination, and arrangement sllghtly yieldable jaws thus formed by the of parts, hereinafter fully described and side portions of the head, its upper edge 9 claimed, reference being had to the accomis adapted to protrude above the upper face panying drawings, in which: 10 of the holder head for reception with- Figure 1 is a side elevation of a tool holder in the diametrically opposite, rectangular constructed in accordance with the invention notches 11 which are provided in the under for use in connect-ion with a parting tool, face of an annular locking washer 12 that this form of cutting tool being shown apis slipped over the split boss after the cutplied thereto; Fig. 2 is a longitudinal secter has been applied. This washer is con- 5 tional view through the holder, the parting structed so as to fit loosely upon the boss. tool being in side elevation; Fig. 3 is a front A clamping nut 13, whose bore is threaded elevation of the device; Fig. 4: is a fragmenand tapered longitudinally, is adapted to be tary top plan view; Fig. 5 is a transverse secthreaded onto the boss so as to compress the tional view showing the clamping nut delongitudinally split side portions of the same 99 tached; and Fig. 6 is a similar view showand thus force the jaws of the holder ining the clamping nut 1n applied position. wardly into firm engagement with the out In the drawing, the tool holder is conting tool. This nut is adapted to be moved structed particularly for use in mounting a inwardly into engagement with the washer parting, or cut-off tool, but it is to be under- 12 during the tightening operation so as to stood that this is only one form of the debind the tool down agalnst its seat in a sevice and that the holder may be constructed cure manner. I for use in connection with any desired cut- W n t S deslred rel se he 6001 for ting tool. any purpose, such as to project the same The numeral 1 designates the elongated farther from the holder, in order to make a 100 rectangular shank of the holder, which is eeper cut or in order that the same may be thickened transversely at one end to prosharpened conveniently, the nut is screwed vide a head 2 which is very strong and duoff the boss it being understood that a ralole. An upwardly projecting boss 3 is wrench or any other desired form of operformed upon this head 2, it being circular in atlng tool (not shown) may be used for this 5 transverse section and tapered slightly topurpose. This will permit the jaws of the ward its upper free end and provided with holder to expand, whereupon the cutting external screw threads. The holder is pro tool will be released. vided at this end with a longitudinal slot 4 The inner or base wall of the slot L is inwhich extends medially through the boss 3 clined upwardly and inwardly from its hori- 1m and the upper portion of the head 2 so as to IItE I p r i n as at 14: so as to provide a open through the upper and end faces of the guide surface which is adapted to serve as effective means for directing the point of any narrow blade or other instrument, which may be inserted within the slot, into engagement with the inner end of the cutting tool, when the latter has become stuck in the slot due to heat expansion or corrosion ofr the metal.

In the present instance, the slot for the re ception of the cutting tool is constructed equal in width throughout when the body of the holder is first made as has been stated hereinbefore, but it is to be understood that in the manufacture of the holder for other cutting tools which are broader than a parting tool, that portion of the slot which extends through the head of the holder and the lower portion of the threaded boss alone is constructed wide enough to accommodate the tool, that portion of the slot which extends through the upper portion of the boss being narrow so as not to reduce the strength of the boss materially. Such details of the construction, which are merely changes in dimension, falling within the scope of the invention may be resorted to in practice.

What I claim is:

1. A tool holder of the class described comprising an elongated body constructed of resilient material, an externally threaded tapered boss formed upon the said body so as to project outwardly therefrom, the said body being provided with a longitudinal tool-receiving slot extending longitudinally through the said boss to divide the same into relatively yieldable sections, and a clamping nut having a tapered threaded bore adapted for engagement with the said boss.

Copies of this patent may be obtained for f ve cents each, by addressing the Commissioner of Patents,

2. A tool holder of the class described comprising an elongated body constructed of resi ient material, an externally threaded tapered boss formed upon the said body so as to project outwardly therefrom, the said body being tool-receiving slot extending longitudinally through the said boss to divide the same into relatively yieldable sections, an annular washer adapted to be positioned upon the said boss so as to surround the same and to engage the outer edge of a tool positioned within the said slot, the said washer being provided in its inner face with diametrically opposite notches for the reception of the adjacent edge of the tool, and a clamping nut having a tapered threaded bore adapted for engagement with the said boss.

3. In a device of the class described, an elongated holder body having a longitudinal tool-receiving slot therein opening through one of its end faces and adjacent longitudinal face, the base wall of the said slot being constructed to form an outer portion parallel to the longitudinal axis of the body and an inner portion which is inclined outwardly toward the longitudinal face of the body through which the slot opens, and means for clamping a tool in the said slot for engagement with the outer portion of the said base wall.

In testimony whereof I affix my signature in presence of two witnesses.

IRA BOTTS. lVitnesses:

R. W. LE lWELL-E, J AMES HAWLEY.

1 Washington, 1). 0.

provided with a longitudinal 

